#! /usr/bin/env python2


"""Pagure specific hook to update pull-requests stored in the database
based on the information pushed in the requests git repository.
"""

from __future__ import print_function, unicode_literals

import os
import sys


# We need to access the database
if 'PAGURE_CONFIG' not in os.environ \
        and os.path.exists('/etc/pagure/pagure.cfg'):
    os.environ['PAGURE_CONFIG'] = '/etc/pagure/pagure.cfg'


import pagure.config  # noqa: E402
import pagure.lib.tasks_services  # noqa: E402


_config = pagure.config.config
abspath = os.path.abspath(os.environ['GIT_DIR'])


def get_files_to_load(new_commits_list):

    print('Files changed by new commits:\n')
    file_list = []
    new_commits_list.reverse()
    for commit in new_commits_list:
        filenames = pagure.lib.git.read_git_lines(
            ['diff-tree', '--no-commit-id', '--name-only', '-r', commit],
            abspath)
        for line in filenames:
            if line.strip():
                file_list.append(line.strip())

    return file_list


def run_as_post_receive_hook():

    repo = pagure.lib.git.get_repo_name(abspath)
    username = pagure.lib.git.get_username(abspath)
    namespace = pagure.lib.git.get_repo_namespace(
        abspath, gitfolder=_config['TICKETS_FOLDER'])
    if _config.get('HOOK_DEBUG', False):
        print('repo:', repo)
        print('user:', username)
        print('namespace:', namespace)

    for line in sys.stdin:
        if _config.get('HOOK_DEBUG', False):
            print(line)
        (oldrev, newrev, refname) = line.strip().split(' ', 2)

        if _config.get('HOOK_DEBUG', False):
            print('  -- Old rev')
            print(oldrev)
            print('  -- New rev')
            print(newrev)
            print('  -- Ref name')
            print(refname)

        if set(newrev) == set(['0']):
            print("Deleting a reference/branch, so we won't run the "
                  "pagure hook")
            return

        commits = pagure.lib.git.get_revs_between(
            oldrev, newrev, abspath, refname)

        pagure.lib.tasks_services.load_json_commits_to_db.delay(
            name=repo,
            commits=commits,
            abspath=abspath,
            data_type='pull-request',
            agent=os.environ.get('GL_USER'),
            namespace=namespace,
            username=username,
        )


def main(args):
    run_as_post_receive_hook()


if __name__ == '__main__':
    main(sys.argv[1:])